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https://www.readbyqxmd.com/read/28437950/maximum-likelihood-sequence-estimation-for-optical-complex-direct-modulation
#1
Di Che, Feng Yuan, William Shieh
Semiconductor lasers are versatile optical transmitters in nature. Through the direct modulation (DM), the intensity modulation is realized by the linear mapping between the injection current and the light power, while various angle modulations are enabled by the frequency chirp. Limited by the direct detection, DM lasers used to be exploited only as 1-D (intensity or angle) transmitters by suppressing or simply ignoring the other modulation. Nevertheless, through the digital coherent detection, simultaneous intensity and angle modulations (namely, 2-D complex DM, CDM) can be realized by a single laser diode...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437872/low-level-viremia-in-hepatitis-b-patients-on-antiviral-treatment-can-we-ignore-it
#2
EDITORIAL
Albert D Min
No abstract text is available yet for this article.
April 24, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28437749/epilepsy-awareness-and-emergency-rescue-training-ignorance-is-bliss
#3
Rohit Shankar, Caryn Jory, Brendan McLean, Phil Tittensor, Matthew Walker
Status epilepticus (SE) has a high mortality rate and is associated with complications such as neurological deficit and cognitive decline. Buccal midazolam is the recommended emergency rescue medication in the UK to reduce the duration of a seizure and SE. It should be administered by an appropriately trained person. There are agreed guidelines on training standards for its administration in the UK produced by the Joint Epilepsy Council of the United Kingdom and Ireland. Training should provide an overview of epilepsy to facilitate safe, person-centered care and appropriate administration of rescue medication to people with epilepsy (PWE)...
April 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28437392/should-we-administer-oxygen-during-an-acute-coronary-syndrome
#4
José Tomás Bennett-Laso, Tomás Kramer-Urrutia, Gabriel Rada
Oxygen therapy is used for the treatment of acute coronary syndrome without further discussion. However, the support of this practice in clinical research is scarce, ignoring the true effects of its implementation. To answer this question, we searched in Epistemonikos database, which is maintained by screening multiple information sources. We identified five systematic reviews including 12 studies overall, five of which were randomized trials. We extracted data, conducted a meta-analysis and generated a summary of findings table using the GRADE approach...
March 29, 2017: Medwave
https://www.readbyqxmd.com/read/28436933/legal-briefing-new-penalties-for-ignoring-advance-directives-and-do-not-resuscitate-orders
#5
Thaddeus Mason Pope
No abstract text is available yet for this article.
2017: Journal of Clinical Ethics
https://www.readbyqxmd.com/read/28436263/modern-methods-for-modeling-change-in-obesity-research-in-nursing
#6
Susan M Sereika, Yaguang Zheng, Lu Hu, Lora E Burke
Persons receiving treatment for weight loss often demonstrate heterogeneity in lifestyle behaviors and health outcomes over time. Traditional repeated measures approaches focus on the estimation and testing of an average temporal pattern, ignoring the interindividual variability about the trajectory. An alternate person-centered approach, group-based trajectory modeling, can be used to identify distinct latent classes of individuals following similar trajectories of behavior or outcome change as a function of age or time and can be expanded to include time-invariant and time-dependent covariates and outcomes...
April 1, 2017: Western Journal of Nursing Research
https://www.readbyqxmd.com/read/28435767/green-toxicology-a-strategy-for-sustainable-chemical-and-material-development
#7
EDITORIAL
Sarah E Crawford, Thomas Hartung, Henner Hollert, Björn Mathes, Bennard van Ravenzwaay, Thomas Steger-Hartmann, Christoph Studer, Harald F Krug
Green Toxicology refers to the application of predictive toxicology in the sustainable development and production of new less harmful materials and chemicals, subsequently reducing waste and exposure. Built upon the foundation of "Green Chemistry" and "Green Engineering", "Green Toxicology" aims to shape future manufacturing processes and safe synthesis of chemicals in terms of environmental and human health impacts. Being an integral part of Green Chemistry, the principles of Green Toxicology amplify the role of health-related aspects for the benefit of consumers and the environment, in addition to being economical for manufacturing companies...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28435501/impact-of-clinical-decision-support-on-radiography-for-acute-ankle-injuries-a-randomized-trial
#8
Shahein Tajmir, Ali S Raja, Ivan K Ip, James Andruchow, Patricia Silveira, Stacy Smith, Ramin Khorasani
INTRODUCTION: While only 15-20% of patients with foot and ankle injuries presenting to urgent care centers have clinically significant fractures, most undergo radiography. We examined the impact of electronic point-of-care clinical decision support (CDS) on adherence to the Ottawa Ankle Rules (OAR), as well as use and yield of foot and ankle radiographs in patients with acute ankle injury. METHODS: We obtained institutional review board approval for this randomized controlled study performed April 18, 2012-December 15, 2013...
April 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28433666/editorial-tricuspid-regurgitation-in-heart-failure-no-longer-ignored
#9
EDITORIAL
Steven C Smart
No abstract text is available yet for this article.
April 19, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28433568/the-role-of-copulatory-plugs-in-the-mosquito-parasitic-nematode-strelkovimermis-spiculatus
#10
Yu-Han Lan, Yi Wang, Randy Gaugler
The mosquito-parasitic nematode, Strelkovimermis spiculatus (Mermithidae: Nematoda) emerges from hosts and aggregates to form mating clusters characterized by intense male-male competition for females. Successful males deposit an adhesive copulatory plug over the female vulva after insemination. In choice experiments, males strongly preferred virgin females, whereas plugged females were ignored. Males made no attempt to displace copulatory plugs deposited by previous males. Plugged females repelled males without the need for physical contact...
April 19, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28432640/osteoporosis-bone-mineral-density-and-ckd-mbd-treatment-considerations
#11
REVIEW
Jordi Bover, Lucía Bailone, Víctor López-Báez, Silvia Benito, Paola Ciceri, Andrea Galassi, Mario Cozzolino
Osteoporosis and chronic kidney disease (CKD) have both independently important potential impact on bone health. A significant number of patients with CKD stages 3a-5D have been shown to have low bone mineral density (BMD), leading to a strikingly elevated risk of fractures (mainly hip fractures) and higher associated morbidity and mortality. Mechanical properties of bone beyond age and menopausal status are additionally affected by intrinsic uremic factors. Therefore, we review in this article not only general concepts of osteoporosis and related consequences, but also the diagnostic and therapeutic implications of low BMD and bone fractures in CKD, beyond increased vascular calcification...
April 21, 2017: Journal of Nephrology
https://www.readbyqxmd.com/read/28432483/what-s-in-a-gold-standard-in-defence-of-randomised-controlled-trials
#12
Marius Backmann
The standardised randomised clinical trial (RCT) has been exceedingly popular in medical research, economics, and practical policy making. Recently, RCTs have faced criticism. First, it has been argued by John Worrall that we cannot be certain that our sample is not atypical with regard to possible confounding factors. I will argue that at least in the case of medical research, we know enough about the relevant causal mechanisms to be justified to ignore a number of factors we have good reason not to expect to be disruptive...
April 21, 2017: Medicine, Health Care, and Philosophy
https://www.readbyqxmd.com/read/28432172/why-tuberculosis-control-programmes-fail-role-of-microlevel-and-macrolevel-factors-an-analysis-from-india
#13
Sudip Bhattacharya, Amarjeet Singh
India accounts for one-fourth of the global tuberculosis (TB) burden. The National TB Program was started in 1962. Over a period of time, some lacunae such as poor case detection rate and incomplete treatment were observed. Later, the government formulated the Revised National Tuberculosis Control Program (RNTCP), which achieved a case detection rate of 70% and a cure rate of 85%. Still, the problem of relapse and defaulter cases persists. In 2014, 6% defaulter cases were reported from India. RNTCP has also focused on microlevel aspects, that is, newer diagnostics such as GenXpert, line probe assay and medicines such as bedaquiline for drug-resistant TB...
April 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28430243/amplitude-versus-phase-effects-in-extreme-ultraviolet-lithography-mask-scattering-and-imaging
#14
Patrick P Naulleau, Markus Benk, Kenneth A Goldberg, Eric M Gullikson, Antoine Wojdyla, Yow-Gwo Wang, Andy Neureuther
It is now well established that extreme ultraviolet (EUV) mask multilayer roughness leads to wafer-plane line-width roughness (LWR) in the lithography process. Analysis and modeling done to date has assumed, however, that the roughness leading to scatter is primarily a phase effect and that the amplitude can be ignored. Under this assumption, simple scattering measurements can be used to characterize the statistical properties of the mask roughness. Here, we explore the implications of this simplifying assumption by modeling the imaging impacts of the roughness amplitude component as a function of the balance between amplitude and phase induced scatter...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28430146/a-new-method-for-single-epoch-ambiguity-resolution-with-indoor-pseudolite-positioning
#15
Xin Li, Peng Zhang, Jiming Guo, Jinling Wang, Weining Qiu
Ambiguity resolution (AR) is crucial for high-precision indoor pseudolite positioning. Due to the existing characteristics of the pseudolite positioning system, such as the geometry structure of the stationary pseudolite which is consistently invariant, the indoor signal is easy to interrupt and the first order linear truncation error cannot be ignored, and a new AR method based on the idea of the ambiguity function method (AFM) is proposed in this paper. The proposed method is a single-epoch and nonlinear method that is especially well-suited for indoor pseudolite positioning...
April 21, 2017: Sensors
https://www.readbyqxmd.com/read/28429748/the-pre-argo-ocean-reanalyses-may-be-seriously-affected-by-the-spatial-coverage-of-moored-buoys
#16
S Sivareddy, Arya Paul, Travis Sluka, M Ravichandran, Eugenia Kalnay
Assimilation methods, meant to constrain divergence of model trajectory from reality using observations, do not exactly satisfy the physical laws governing the model state variables. This allows mismatches in the analysis in the vicinity of observation locations where the effect of assimilation is most prominent. These mismatches are usually mitigated either by the model dynamics in between the analysis cycles and/or by assimilation at the next analysis cycle. However, if the observations coverage is limited in space, as it was in the ocean before the Argo era, these mechanisms may be insufficient to dampen the mismatches, which we call shocks, and they may remain and grow...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428727/improved-methods-for-evaluating-the-environmental-impact-of-nanoparticle-synthesis%C3%A2
#17
Bradley T Reid, Scott M Reed
With the market for products containing nanoparticles growing, improvements in the efficiency of nanoparticle synthesis are poised to have significant positive economic and environmental impacts. While many metrics have been designed for measuring the efficiency of small molecule synthesis, the use of these metrics for evaluating nanoparticle preparation has not been optimized. Here a critical evaluation of various green chemistry metrics is provided as they are applied to a common set of nanoparticle synthetic methods...
August 7, 2016: Green Chemistry: An International Journal and Green Chemistry Resource: GC
https://www.readbyqxmd.com/read/28428638/dynamic-behaviors-of-condensing-clusters-based-on-rayleigh-scattering-experiment
#18
Zhong Lan, Di Wang, Kejian Cao, Quan Xue, Xuehu Ma
Condensation is a common physical process which widely exists in natural phenomena and thermal energy systems. In a condensation process, cluster is considered as the important bridge between vapor body and condensates. However, limited by the minimum imaging dimension of traditional measurements, early experimental studies about initial stages of condensation process are not sufficient. This paper provides a powerful optical platform for the study of dynamic clusters process. Based on the Rayleigh law, optical experiments were firstly introduced to investigate the clusters spatial distribution close to and far from condensation surface...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28427405/ceiling-effect-in-emr-system-assimilation-a-multiple-case-study-in-primary-care-family-practices
#19
Marie-Claude Trudel, Josianne Marsan, Guy Paré, Louis Raymond, Ana Ortiz de Guinea, Éric Maillet, Thomas Micheneau
BACKGROUND: There has been indisputable growth in adoption of electronic medical record (EMR) systems in the recent years. However, physicians' progress in using these systems has stagnated when measured with maturity scales. While this so-called ceiling effect has been observed and its consequences described in previous studies, there is a paucity of research on the elements that could explain such an outcome. We first suggest that in the context of EMR systems we are in presence of a "tiered ceiling effect" and then we show why such phenomenon occurs...
April 20, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28427209/hif1%C3%AE-regulates-single-differentiated-glioma-cell-dedifferentiation-to-stem-like-cell-phenotypes-with-high-tumorigenic-potential-under-hypoxia
#20
Pan Wang, Chuan Lan, Shuanglong Xiong, Xiuwen Zhao, You'an Shan, Rong Hu, Wenwu Wan, Shuangjiang Yu, Bin Liao, Guangzhi Li, Junwei Wang, Dewei Zou, Bing Chen, Hua Feng, Nan Wu
The standard treatment for Glioblastoma multiforme (GBM) is surgical resection and subsequent radiotherapy and chemotherapy. Surgical resection of GBM is typically restricted because of its invasive growth, which results in residual tumor cells including glioma stem cells (GSCs) and differentiated cells. Recurrence has been previously thought to occur as a result of these GSCs, and hypoxic microenvironment maintains the GSCs stemness also plays an important role. Summarizing traditional studies and we find many researchers ignored the influence of hypoxia on differentiated cells...
March 3, 2017: Oncotarget
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